Exhaust Gasket Set Mopar 5.9L Cummins 24 Valve

The Exhaust Gasket Set Mopar 5.9L Cummins 24 Valve (MPN 6013) by REMFLEX is engineered to seal the critical junction between your exhaust manifold and cylinder head on Dodge Cummins diesel engines. As a diesel mechanic knows, factory gaskets on high-mileage 24-valve Cummins engines deteriorate from thermal cycling and combustion pressure, leading to exhaust leaks, rough idle, and reduced turbo efficiency. This gasket set replaces worn factory seals that no longer contain the extreme heat and pressure inherent to diesel combustion, restoring proper exhaust scavenging and preventing costly secondary damage to manifold flanges.

REMFLEX gaskets are manufactured from premium graphite-impregnated composite material that outperforms standard steel-core gaskets in thermal stability and resilience. The 1.688-inch round port design matches the OEM manifold flange geometry precisely, ensuring zero-leak sealing without the brittleness that causes factory gaskets to fail prematurely. Graphite composition maintains flexibility across the extreme temperature swings typical of diesel operation—from subfreezing cold starts to sustained 1,200°F+ exhaust gas temperatures—while resisting compression set and extrusion. This material science prevents gasket relaxation and blowby, keeping your turbocharger's boost pressure clean and your engine's combustion chamber properly scavenged for consistent power and emissions control.

Dodge Cummins owners running 5.9L 24-valve engines—whether stock, mildly tuned, or heavily modified—will benefit most from this replacement set when performing routine manifold removal, turbo service, or head gasket work. Installation requires manifold disassembly and fastener torque-down to factory spec; no special tools or machine work needed. The graphite composition is compatible with all fuel types, EGR systems, and aftermarket tuning configurations common to the 24-valve platform. For anyone serious about diesel longevity and exhaust system integrity, this gasket set is an OEM-equivalent upgrade that costs far less than repairing a warped manifold or cracked cylinder head caused by chronic exhaust leakage.